AI Image Upscaler
Upscale images to 1K, 2K, or 4K with AI in your browser
Drop your image here
JPG, PNG, or WebP, up to 2048×2048
Tips
Start small — Try an image under 1000 pixels first to see how fast your device runs the model.
Clean inputs win — Screenshots, icons, and product photos upscale better than noisy or heavily compressed pictures.
Keep the tab open — Upscaling runs on your device. Closing the page stops the work.
Resize first if needed — Images over 2048×2048 are not accepted. Downsize them with the Image Resizer, then upscale.
How to Upscale an Image
Add your image
Drag in a JPG, PNG, or WebP file, or click to browse. One image at a time, up to 2048×2048 pixels.
Pick a size and upscale
Choose 1K, 2K, or 4K and click Upscale. The AI model rebuilds the image at that resolution, right on your device. The first run downloads the model, so it takes a few extra seconds.
Compare and download
Drag the slider to check the result against the original, then download the PNG. Nothing is uploaded at any point.
About AI Image Upscaling
A small image stretched to a larger size normally goes soft, because the extra pixels are averaged from their neighbors. This tool runs a Real-ESRGAN model trained for image restoration, so edges stay defined and textures keep their grain instead of smearing. You can pick a 1K, 2K, or 4K target for the long edge of the result.
The model runs entirely in your browser through WebAssembly and WebGPU. Your image is decoded, upscaled, and encoded on your device, and nothing is sent to a server. On machines with a capable GPU the work is hardware accelerated. Other devices fall back to the CPU and take longer.
Upscaling works best on images that are clean but small: screenshots, icons, product photos, older digital photos. It cannot recover detail the camera never captured, and heavily compressed images may keep some artifacts. For 4K output from a small image, anything past 4x the original size is filled in by high-quality scaling rather than new detail. The result downloads as a PNG.
Frequently Asked Questions
Is this AI image upscaler free?
Yes. There are no accounts, credits, watermarks, or usage limits. The processing happens on your device, so there is no server cost passed on to you.
Are my images uploaded anywhere?
No. The AI model runs locally in your browser. Your image never leaves your device, and nothing is stored or transmitted.
What do the 1K, 2K, and 4K options mean?
They set the long edge of the result to 1024, 2048, or 4096 pixels, keeping the original aspect ratio. The AI enhances the image first, then it is resized to the target you picked. For 4K output from a small image, anything past 4x the original size comes from high-quality scaling, not new detail.
Which formats are supported?
You can add JPG, PNG, and WebP images up to 2048×2048 pixels and 20 MB. The upscaled result downloads as a PNG.
Why is the first upscale slow?
The first run downloads the AI model, a file of a few megabytes, and caches it in your browser. Later visits load it from the cache and start faster. Speed also depends on your device: browsers with WebGPU use the GPU, others use the CPU.
Can it fix a very blurry photo?
It can sharpen soft or small images, but it cannot recreate detail the camera never captured. A heavily blurred photo will look cleaner at a larger size, not perfectly sharp.
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